The four northern spring classics, on one hand the Tour of Flanders and Paris-Roubaix in Flanderson the other the walloon races La Flèche Wallonne und Liège–Bastogne–Liège, had a common expierence in the last 100 years. They all tell about the culture of their country, they are connected sporty as historic and embody the special and extraordinary of one-day races in springtime.